| Rank | Abbreviation | Meaning |
|---|
| ***** | HSCA | hydrated sodium calcium aluminosilicate
| |
| *** | HSCA | Health and Social Care Act
| |
| *** | HSCA | Hebrew School Condominium Association
| |
| *** | HSCA | Harvard-Smithsonian Center for Astrophysics
| |
| ** | HSCA | Health Sciences Communication Association
| |
| ** | HSCA | Humane Society for Companion Animals
| |
| ** | HSCA | Healthcare Supply Chain Association
| |
| ** | HSCA | Health Social Care Alliance
| |
| ** | HSCA | Health Safety Compliance Agency
| |
| * | HSCA | Health and Social Care Academy
| |
| * | HSCA | Health Services Corporation of America
| |
| * | HSCA | Hampshire Schools Cricket Association
| |
| * | HSCA | Hot and Spicy Cooking Art
| |
| * | HSCA | Hawaii State Chiropractic Association
| |
| * | HSCA | Health Services Corp of America
| |
| * | HSCA | High Street Christian Academy
| |
| * | HSCA | High School Coaches Association
| |
| * | HSCA | Hawaiian Shores Community Association
| |
| * | HSCA | Hawaii State Cycling Association
| |
| * | HSCA | host cell surface antigen
| |
| * | HSCA | Hereditary Spinal Cerebellar Ataxia
| |
| * | HSCA | Human Service Charities of America
| |
| * | HSCA | High School Complex Area
| |
| * | HSCA | Hawaii School Counselor Association
| |
| * | HSCA | Hazardous Substance Cleanup Act
| |